0001104659-23-115815.txt : 20231108 0001104659-23-115815.hdr.sgml : 20231108 20231108171653 ACCESSION NUMBER: 0001104659-23-115815 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20231106 FILED AS OF DATE: 20231108 DATE AS OF CHANGE: 20231108 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Rossi Michael J CENTRAL INDEX KEY: 0001948795 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38650 FILM NUMBER: 231389267 MAIL ADDRESS: STREET 1: 230 PARK AVENUE STREET 2: SUITE 3350 CITY: NEW YORK STATE: NY ZIP: 10169 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Y-mAbs Therapeutics, Inc. CENTRAL INDEX KEY: 0001722964 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 474619612 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 230 PARK AVENUE STREET 2: SUITE 3350 CITY: NEW YORK STATE: NY ZIP: 10169 BUSINESS PHONE: 212-847-9841 MAIL ADDRESS: STREET 1: 230 PARK AVENUE STREET 2: SUITE 3350 CITY: NEW YORK STATE: NY ZIP: 10169 4 1 tm2330155-2_4seq1.xml OWNERSHIP DOCUMENT X0508 4 2023-11-06 0 0001722964 Y-mAbs Therapeutics, Inc. YMAB 0001948795 Rossi Michael J C/O Y-MABS THERAPEUTICS, INC. 230 PARK AVENUE, SUITE 3350 NEW YORK NY 10169 1 1 0 0 President and CEO 0 Employee Stock Option (right to buy) 5.75 2023-11-06 4 A 0 615240 0 A 2033-11-06 Common Stock 615240 615240 D Stock options granted to the Reporting Person pursuant to the 2018 Equity Incentive Plan of Y-mAbs Therapeutics, Inc. The stock options shall vest and become exercisable as to 25% of the shares subject to the option on November 6, 2024, and thereafter vest and become exercisable as to 1/48th of the shares in equal monthly installments, until such time as the option is 100% vested, subject to the continuing employment of the Reporting Person on each vesting date. /s/ Michael J. Rossi 2023-11-08